Newly found soil bacterium breaks down bee-harming pesticide fast
Gao Z, Wang S, Yang X, Yin R, Ma R
Phytoremediation
The neonicotinoid residue that lingers in soil long after it's sprayed is one reason bees and other pollinators struggle in farmland near your garden, and a microbe that clears it out faster could ease that burden.
Researchers found a bacterium living in farm soil that eats thiamethoxam, a common pesticide that's tough on bees and other pollinators, faster than any microbe ever recorded. They figured out exactly how the bacterium breaks the chemical apart, step by step, using it as a nitrogen source to fuel its own growth. That discovery could help turn this microbe into a practical tool for cleaning up pesticide-polluted soil.
Key Findings
Isolated strain Paenarthrobacter nicotinovorans GY-1 degrades thiamethoxam at 2.08 mg·L⁻¹·h⁻¹, the fastest rate reported for any microorganism
The bacterium uses thiamethoxam as its sole nitrogen source, suppressing glycolysis and reprogramming its central metabolism to do so
Mass spectrometry and NMR identified two breakdown intermediates (THX-1, THX-2), revealing a nitro-reduction and deimination pathway for the pesticide's transformation
chevron_right Technical Summary
Scientists discovered a soil bacterium that breaks down thiamethoxam, a widely used neonicotinoid pesticide linked to pollinator decline, faster than any known microbe. This could lead to new tools for cleaning up pesticide-contaminated farmland and reducing the chemical's lingering environmental footprint.
Abstract Preview
Original paper
Rapid Thiamethoxam Biodegradation by Paenarthrobacter nicotinovorans GY-1: Mechanistic Insights and Nitro-Reductive Pathway Elucidation.
The neonicotinoid insecticide thiamethoxam (THX) poses ecological risks and requires efficient bioremediation strategies. We isolated a highly efficient THX-degrading strain, Paenarthrobacter nicot...
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